JP3371673B2 - Monitoring and control system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supervisory control system, and more particularly to a connection system between a CRT display device and a computer. 2. Description of the Related Art In a large-scale supervisory control system such as a power system or a plant, an information management level, a supervisory control level, and a local control level are integrated by network connection, and each level includes a large number of computers and CRT displays. An input / output device such as a device is prepared.
A system is constructed by connecting with an AN. FIG. 3 shows a part of the configuration of a monitoring and control system, which is a network connection of a workstation 1 and a computer 2 for information management and a CRT display 3 and a computer 4 and a CRT display 5 for monitoring and control. Built on the network connection. Here, the connection between the CRT display device and the computer in a large number of combinations is determined by a client / server system, and the CRT display device is provided with a processor for connection processing and the like, and is provided in hardware. By the connection / switching operation on the connected input button (POK),
The other computer and the CRT display device are connected by software, and management information in the connected computer is displayed on the CRT.
It is displayed on the display device and processes input from the operator. [0005] Although a computer for monitoring and control is used, a failure may occur due to a hardware trouble. When a failure occurs in a computer connected to a certain CRT display device, the computer is disconnected from the CRT display device previously connected in software. [0006] After that, even if the computer that has recovered from the trouble starts up, it is not connected to the CRT display device connected up to that point, and the computer and the CRT display device can be arbitrarily connected. Is operated again by operating the connection / switching button of the POK. In particular, when a plurality of computers are stopped due to a power failure due to a system failure or the like, it is difficult for an operator to know which CRT display device was connected to which computer before the software connection was cut off. Therefore, it takes time to start up the system. [0008] It is an object of the present invention to provide a monitoring and control system for automating the connection between a computer and a CRT display device in a number of combinations. According to the present invention, there is provided a monitoring control system in which a number of computers and a CRT display device are connected via a network, and each computer and the CRT display device are connected in combination by a client / server system. The CRT due to a failure of the computer, etc.
After the connection with the display device is disconnected, when the computer is started up, it is checked whether or not there is an unconnected CRT display device. It is checked whether the CRT display device that has been connected is connected to another computer. If it is not connected to another computer, the C
It is checked whether or not a master key for setting whether connection switching of the RT display device is enabled or disabled is disabled . When the master key is disabled, the CRT is disabled.
Means for automatically connecting the display device to the computer to which the display device was previously connected is provided. FIG. 1 shows a connection processing procedure according to an embodiment of the present invention, in which a server in a client / server system performs a processing function when a computer is started up. It is checked whether there is a CRT display device CRTn that is not connected due to a failure of the computer or the like (S1). If there is no CRT display device that is not connected, the process is terminated. In this check, the CRT that is not connected is
C that was previously connected when the display device CRTn was present
It is checked whether or not the RT display device CRTn is connected to another computer (S2), and if connected, the process returns to the check as to whether or not the next CRT display device CRTn + 1 exists (S1). If the CRTn is not connected to another computer, the POK of the CRTn checks whether the connection switching master key is in a disabled (impossible) state (S3). This master key, as shown in FIG.
A key B for enabling / disabling the operation of the CRT connection / switching button A on the POK, which is set to a disabled state.
If not, the connection can be switched by a button. When the master key is in the disabled state, the CRT display device CRTn is automatically connected to the previously connected computer (S4), and the process returns to the connection process for the next CRT display device (S1). Therefore, according to the present embodiment, if the master key on the POK on each CRT display device is disabled when the computer is started up upon recovery from a failure or the like, the original The connection state of the CRT display device can be automatically changed to the connection state of the CRT display device after the computer is restored. Since the connection is automatically established when the computer starts up, the trouble of connecting the CRT display device by measuring the start-up timing of the computer becomes unnecessary. In addition, if the master key on the POK is set to the non-permissible side in system operation, a combination pattern in which each CRT display device and the computer are used as a pair can be automatically formed. That is, even after the computer stops and starts up, the operation pattern up to that time can be maintained. As described above, according to the present invention, the connection with the CRT display device is cut off due to a failure of the computer or the like, and the CRT display which was connected up to that time when the computer was started up thereafter. Automatic connection to the original computer is performed on condition that there is no device and the master key of the CRT display device to be connected is disabled. This can eliminate the trouble of connecting to a CRT display device when a computer or the like breaks down, and has the effect of speeding up the system startup.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a computer and a CRT according to an embodiment of the present invention.
Connection processing procedure with the display device. FIG. 2 is an example of a POK key arrangement in the embodiment. FIG. 3 is a configuration example of a monitoring control system. [Description of Signs] 1 ... Workstation 2, 4 ... Computer 3, 5 ... CRT display device

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G06F 1/00 G06F 1/26-1/32 G05B 23/00 G06F 13/00

Claims (1)

(57) [Claim 1] In a monitoring control system in which a number of computers and a CRT display device are connected via a network, and each computer and the CRT display device are connected in combination by a client / server method, After the connection with the CRT display device is cut off due to a failure of the computer or the like, it is checked whether or not there is a CRT display device that is not connected when the computer is started up. When the device is present, check whether or not the previously connected CRT display device is connected to another computer. If it is not connected to another computer, check the CRT display device.
Checks whether the master key for setting the connection switching of the display device to enable or disable is disabled . When the master key is disabled, the CRT display device is automatically connected to the computer that was previously connected. A monitoring and control system, comprising: